Complete List: America's Richest Counties

7. Morris County, N.J.

Median income: $89,587

Many parts of New Jersey are bleeding residents to the more affordable South and West, but not Morris County, which has swelled to almost 500,000 residents, by census estimates, as affluent residents are less likely to migrate. There they find properties such as this five-bedroom, four-and-a-half-bathroom Morristown brick colonial house. It is listed for $1 million by Burgdorff Realtors.